BVI photometry of 4 open clusters

CCD observations in the B, V and I passbands have been used to generate colour-magnitude diagrams reaching down to V~19mag for two slightly characterized (Melotte 105 and Hogg...

研究采用电荷耦合器件（Charge-Coupled Device, CCD）在B、V、I三个测光通带中获取的观测数据，为两个仅得到初步表征的星团（Melotte 105与Hogg……）构建了极限星等可达V≈19星等的颜色-星等图。